Update names - woodcutting group bonus & leprechaun's luck

[YvesW]

Not sure if you accept PRs, but in case you do...

Struct 4693 is the woodcutting group bonus code (please refer to script 5846 for confirmation), which I also use in https://github.com/runelite/runelite/pull/17219

I'm not 100% sure what varbit15350 does, but struct 4694 is the leprechaun's luck (see script 5846 again for confirmation). I'm unable to confirm this ingame though, since the leprechaun charms got removed.